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Crystal Structures and Magnetic Studies of Naphthalene Derivatives Containing Nitronyl Nitroxides
Author(s) -
DeQing Zhang,
HongQing Zhu,
Liang Ding,
Wei Xu,
Wei Liu,
DaoBen Zhu
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210503
Subject(s) - chemistry , monoclinic crystal system , crystallography , crystal structure , antiferromagnetism , crystal (programming language) , singlet state , nitroxide mediated radical polymerization , squid , polymer , excited state , condensed matter physics , ecology , physics , computer science , nuclear physics , programming language , biology , radical polymerization , organic chemistry , copolymer
Crystal structures of new nitronyl nitroxide derivatives 1, 2 and 3 were determined with X‐ray diffraction analysis: 1, monoclinic, C 2 /c, a = 1.2404(5) nm, b = 0.9730(5) um, c = 2.7049(10) ran, β = 98.189(15)°, V = 3.2315(24) nm 3 , Z = 8; 2, or‐thorhombic, Pbca, a = 0.61262(2) nm, b = 1.11426(6) nm, c = 2.30543(13) nm, V = 1.57373(13) nm 3 , Z = 4; 3, monoclinic, P 2(1)/ n, a =0.64253(4) nm, b =2.55003(17) nm, c = 1.15497(6) nm, β = 95.000(3)°, V = 1.8852(2) nm 3 , Z = 4. Their magnetic properties were measured with SQUID and analyzed based on their crystal structures with simple singlet‐triplet, modified one dimensional antiferromagnetic chain and modified singlet‐triplet models respectively: 1, J/k b = −2.5 K; 2, J/k b = 7.8 K, θ = 2.8 K; 3, J/k b = −0.96 K, θ = 0.21 K.